ABSORBING SOLUTION COMPOSITION FOR ABSORPTION-REFRIGERATOR

PURPOSE:To obtain an absorbing soln. compsn. inhibiting the corrosion, especially pitting corrosion of iron and iron alloys by adding polyethyleneimine to an aq. soln. contg. lithium bromide as the principal component. CONSTITUTION:Polyethyleneimine is added to an aq. lithium bromide soln. having a...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAGISHI TETSUYUKI, OTA KOJI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMBINED HEATING AND REFRIGERATION SYSTEMS DIFFUSION TREATMENT OF METALLIC MATERIAL DYES HEAT PUMP SYSTEMS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MECHANICAL ENGINEERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NATURAL RESINS NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE PAINTS POLISHES REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain an absorbing soln. compsn. inhibiting the corrosion, especially pitting corrosion of iron and iron alloys by adding polyethyleneimine to an aq. soln. contg. lithium bromide as the principal component. CONSTITUTION:Polyethyleneimine is added to an aq. lithium bromide soln. having a high concn. of about 50-70% alkalified with lithium hydroxide, etc., and 0.1-1g/1 molybdate is further added if necessary. The amt. of the polyethyleneimine added is preferably 0.1-30g/l and the average mol. wt. is preferably 300-70,000. When the resulting aq. soln. is used as the objective absorbing soln. compsn., the corrosion, especially pitting corrosion of iron and iron alloys as the structural materials of an absorption refrigerator is remarkably inhibited and stable operation is enabled over a long period of time.